Question #1fce2

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Answer 1 · 2018-01-09T03:22:54

#E_k= 3526J #

The formula for kinetic energy is:

#K = 1/2mv^2#

a.
#rArr K_1= 1/2*52.4 Kg*(10..7 m/s)^2 =2999.63 ((kg*m)/s^2)*m#

# K_1 ~~3000 N.m = 3000 J#

b. #K_2 = 3526 J#

c. #(K1)/(K2) = 0.85 or 85%#

which is the same as #(10.7/11.6)^2# -- check it out#